Improved machine for rolling tapering tubes



UNITED STATES PATENT OFFICE.

W'ILLIM OSTRANDEI'I, OF NEV YORK, N. Y.

IMPROVED MACHINE FOR ROLLING TAPERING TUBES.

Speeilicaiion forming part of Letters Iatcnt No. 16,395, dated January 13, 1857.

To all whom it may concern:

Be it known that I, WILLIAM OsrEANDEE, of New York, county of New York, and State of New York, have invented certain new and useful Improvements in Machinery for Itollin g Taper Tubes; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being made to the annexed drawings, making a part of this specification, in which- Figure I is a top or plan view. Fig. II is a transverse vertical section on the line a; a' ot' Fig. I, and similar letters indicate similar parts throughout.

My invention consists in a peculiar construction of the cylindrical rollers employed, and in combining these with a tapering Inandrel or former77 in such Inanner that one pair ot" the rollers will suffice for work of any diameter. I construct the rollers by placing series of disks or plates or' metal side by side upon a shaft, then screwing them up tightly together' and `turning oil' the surface into the form of a true cylinder. The screw is then to be so slackened that the disks shall be free to revolve independently of each other upon the shaft. This shaft is shown at a and the disks at Z), a portion, b', being exhibited in section. It has journals at its ends to allow of rotation in its bearings. Two rollers thus construct-ed are mounted in a frame, so as to stand at an angle to each other, in the manner shown in Fig. I, the bearings c being movable horizontally, and adjustable by setscrews d, in order that the rollers may be set at any desired angle. Immediately over these rollers a tapering mandrel, c, is placed, being of a size and form suitable for lany one kind of work. This mandrel is trmly affixed to a shaft extending into an upright part, f, of the machine, giving it suitable support, and it has rotary Inotion imparted either by a crank or pulley.

The operation will be as follows: An appropriate mandrel for thedesircd work being put in-as, for instance, to Inake the body of a sugar-mold-the rollers are to be adj usted by means of the set-screws c into contact with it along their wholellength. A sheet of metal which had previously been cut to the shape of an unrolled body of a sugarmold is then placed between the mandrel and the two rollers, as at g, Fig. II. The rollers being then pressed tirmly against the mandrel, and rotary Inotion being given to that in the direction indicated by the arrow, the sheet will be rolled around the mandrel, in the usual manner of rolling cylindrical tubes. If the shorter curved side ofthe sheet had been placed toward the smaller end of the mandrel, the form when rolled up would be that of the desired body of a mold, I'or the rollers being composed of separate and independent disks or sections7 each of those sections would have at its surface the speed imparted to it of that portion of the mandrel against which it was pressed, the sheet of course being between, while had the rollers been solid the speed of the surface at all parts of its length Inust necessarily be uniform, whereas that ofthe surface of the mandrel, in consequence of its conical shape, Vary ing at its taper, there must be at some parts of the length a sliding orl the one' surface upon "the other, which would throw the sheet constantly out of place. I

In practice it will be found that a very convenient Inethod of using the rollers will be to mount the pair in a frame which is hinged at its lower corner, as at t, Fig. II, and placing beneath it a strong spring, to keep the rollers up against the mandrel, as clearly shown. IVhen, now, a sheet is to be introduced, pressing upon the unattached end of tlifgame will remove the rollers, when the sheet-.iy-.be n

laid onto both rollers; then if the frame be released the forse of the spring will bring the sheet against the Inandrel7 whereby the curve will be given to it as desired. For work of any other size or taper an appropriate niandrel is to be substituted and the angle of the rollers adjusted to lines of contact with it, as above described.

I claim- The combination, with a tapering mandrel, of cylindrical rollers formed of disks or sections, as described, for the purpose of rolling a tapering tube, substantially as set forth.

YILLIAM OSTBANDER.

lvitnesses:

S. H. MAYNAED, Tuoiuas DUcEr. 

